US9573781B2 - Feed device and recording apparatus - Google Patents

Feed device and recording apparatus Download PDF

Info

Publication number
US9573781B2
US9573781B2 US14/739,448 US201514739448A US9573781B2 US 9573781 B2 US9573781 B2 US 9573781B2 US 201514739448 A US201514739448 A US 201514739448A US 9573781 B2 US9573781 B2 US 9573781B2
Authority
US
United States
Prior art keywords
roller
motor
reverse
sheet
medium
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
US14/739,448
Other languages
English (en)
Other versions
US20150375949A1 (en
Inventor
Shinji Kanemaru
Hitoshi Igarashi
Takayuki Tanaka
Tetsuya Tamura
Hiroyuki Tajima
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Seiko Epson Corp
Original Assignee
Seiko Epson Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Seiko Epson Corp filed Critical Seiko Epson Corp
Assigned to SEIKO EPSON CORPORATION reassignment SEIKO EPSON CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: IGARASHI, HITOSHI, KANEMARU, SHINJI, TAMURA, TETSUYA, TANAKA, TAKAYUKI, TAJIMA, HIROYUKI
Publication of US20150375949A1 publication Critical patent/US20150375949A1/en
Application granted granted Critical
Publication of US9573781B2 publication Critical patent/US9573781B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H9/00—Registering, e.g. orientating, articles; Devices therefor
    • B65H9/002—Registering, e.g. orientating, articles; Devices therefor changing orientation of sheet by only controlling movement of the forwarding means, i.e. without the use of stop or register wall
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00—Separating articles from piles
    • B65H3/02—Separating articles from piles using friction forces between articles and separator
    • B65H3/06—Rollers or like rotary separators
    • B65H3/0607—Rollers or like rotary separators cooperating with means for automatically separating the pile from roller or rotary separator after a separation step
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00—Separating articles from piles
    • B65H3/02—Separating articles from piles using friction forces between articles and separator
    • B65H3/06—Rollers or like rotary separators
    • B65H3/0661—Rollers or like rotary separators for separating inclined-stacked articles with separator rollers above the stack
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00—Separating articles from piles
    • B65H3/02—Separating articles from piles using friction forces between articles and separator
    • B65H3/06—Rollers or like rotary separators
    • B65H3/0669—Driving devices therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00—Separating articles from piles
    • B65H3/46—Supplementary devices or measures to assist separation or prevent double feed
    • B65H3/52—Friction retainers acting on under or rear side of article being separated
    • B65H3/5246—Driven retainers, i.e. the motion thereof being provided by a dedicated drive
    • B65H3/5253—Driven retainers, i.e. the motion thereof being provided by a dedicated drive the retainers positioned under articles separated from the top of the pile
    • B65H3/5261—Retainers of the roller type, e.g. rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/06—Feeding articles separated from piles; Feeding articles to machines by rollers or balls, e.g. between rollers
    • B65H5/062—Feeding articles separated from piles; Feeding articles to machines by rollers or balls, e.g. between rollers between rollers or balls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/34—Varying the phase of feed relative to the receiving machine
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H7/00—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles
    • B65H7/02—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors
    • B65H7/06—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors responsive to presence of faulty articles or incorrect separation or feed
    • B65H7/08—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors responsive to presence of faulty articles or incorrect separation or feed responsive to incorrect front register
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H9/00—Registering, e.g. orientating, articles; Devices therefor
    • B65H9/004—Deskewing sheet by abutting against a stop, i.e. producing a buckling of the sheet
    • B65H9/008—Deskewing sheet by abutting against a stop, i.e. producing a buckling of the sheet the stop being formed by reversing the forwarding means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2220/00—Function indicators
    • B65H2220/01—Function indicators indicating an entity as a function of which control, adjustment or change is performed, i.e. input
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2220/00—Function indicators
    • B65H2220/02—Function indicators indicating an entity which is controlled, adjusted or changed by a control process, i.e. output
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2220/00—Function indicators
    • B65H2220/03—Function indicators indicating an entity which is measured, estimated, evaluated, calculated or determined but which does not constitute an entity which is adjusted or changed by the control process per se
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/50—Auxiliary process performed during handling process
    • B65H2301/51—Modifying a characteristic of handled material
    • B65H2301/512—Changing form of handled material
    • B65H2301/5121—Bending, buckling, curling, bringing a curvature
    • B65H2301/51212—Bending, buckling, curling, bringing a curvature perpendicularly to the direction of displacement of handled material, e.g. forming a loop
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2403/00—Power transmission; Driving means
    • B65H2403/50—Driving mechanisms
    • B65H2403/51—Cam mechanisms
    • B65H2403/512—Cam mechanisms involving radial plate cam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2403/00—Power transmission; Driving means
    • B65H2403/90—Machine drive
    • B65H2403/94—Other features of machine drive
    • B65H2403/942—Bidirectional powered handling device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/11—Details of cross-section or profile
    • B65H2404/111—Details of cross-section or profile shape
    • B65H2404/1112—D-shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/50—Surface of the elements in contact with the forwarded or guided material
    • B65H2404/51—Cross section, i.e. section perpendicular to the direction of displacement
    • B65H2404/513—Cross section, i.e. section perpendicular to the direction of displacement with limited number of active areas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/20—Location in space
    • B65H2511/24—Irregularities, e.g. in orientation or skewness
    • B65H2511/242—
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2513/00—Dynamic entities; Timing aspects
    • B65H2513/40—Movement
    • B65H2513/41—Direction of movement
    • B65H2513/412—Direction of rotation of motor powering the handling device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2515/00—Physical entities not provided for in groups B65H2511/00 or B65H2513/00
    • B65H2515/70—Electrical or magnetic properties, e.g. electric power or current
    • B65H2515/704—
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2553/00—Sensing or detecting means
    • B65H2553/51—Encoders, e.g. linear
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2553/00—Sensing or detecting means
    • B65H2553/80—Arangement of the sensing means
    • B65H2553/81—Arangement of the sensing means on a movable element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/13—Parts concerned of the handled material
    • B65H2701/131—Edges
    • B65H2701/1311—Edges leading edge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2801/00—Application field
    • B65H2801/03—Image reproduction devices
    • B65H2801/12—Single-function printing machines, typically table-top machines

Definitions

  • the present invention relates to a feed device and a recording apparatus that perform a skew removal operation that removes skew (slant) of a medium in a process of feeding the medium.
  • JP-A-2007-84224 discloses a recording apparatus provided with a feed device that has a skew removing function for a sheet (example of a medium).
  • the recording apparatus is provided with a transport roller pair (example of a second roller) at a position further to the downstream side in the feeding direction than the feed roller (example of a first roller) in a process of feeding a sheet, and performs skew removal on the sheet by reversing the transport roller pair in a state where the feed roller is stopped after the leading edge of the sheet is delivered to the downstream side by a predetermined amount from the nip point of the transport roller pair.
  • a “biting operation” that delivers a predetermined amount of the leading edge of the sheet fed by the feed roller further to the downstream side than the nip point of the transport roller pair and, thereafter, a “discharging operation” in which the transport roller pair is reversed in a state where the feed roller is stopped are performed. Since the sheet is in a state of being nipped by the feed roller and a retard roller, the sheet, the leading edge of which is discharged to the upstream side, is bent between the feed roller and the transport roller pair, and the sheet leading is not at the nip point of the transport roller pair, that is, the sheet becomes parallel and skew is removed. In cases where the sheet is thick, because the feed roller is prevented from reversing when the discharging operation is performed, a braking unit (reversal prevention unit of the feed roller) is provided in the recording apparatus disclosed in JP-A-2007-84224.
  • a hopper is biased in a direction from the standby position towards the feeding position by an elastic member, and is inclined between the standby position and the feed position interlinked with the rotation of the rotation shaft of the feed roller by the power of the feed motor via engagement between a cam provided on the rotation shaft of the feed roller and a cam follower provided in the hopper.
  • This type of problem is not limited to the biasing force of the elastic member that biases the hopper being the cause, and in a configuration that performs skew removal by reverse transporting a medium with a second roller, it is similarly difficult to appropriately perform the skew removal even in cases where the first roller is excessively reversed by any external force.
  • An advantage of some aspects of the invention is to provide a feed device and a recording apparatus able to appropriately perform skew removal on a medium in which the medium is reverse transported to the opposite side to the transport direction by reversing at least the second roller on the downstream side in the transport direction among the first roller and the second roller.
  • a feed device including: a first roller; a second roller provided further to the downstream side in a transport direction of a medium than the first roller; a first motor by which the first roller is driven; a second motor by which the second roller is driven; and a controller that controls the second motor and performs a skew removal operation accompanying reverse transport of the medium by the second roller, in which the controller causes a suppression current that suppresses the reverse transport speed of the first roller to the reverse transport speed of the second roller or less to flow to the first motor in at least a part of the skew removal operation period in which the skew removal operation is performed by the second roller reverse transporting the medium.
  • the controller causes the second roller to reverse by controlling the second motor, and causes a suppression current to flow to the first motor in at least a part of the skew removal operation period.
  • the medium is reverse transported to the upstream side in the transport direction by the reversal of the second roller, and the reverse transport speed (a speed of zero or more) of the first roller is suppressed to the reverse transport speed of the second roller or lower. Therefore, excessive reversal of the first roller is suppressed.
  • the force that suppresses the reversal of the first roller is weakened by the first motor stopping in a state where the electrical conduction is cut off, there is concern of the first roller being reverse excessively rotated when an any external force (biasing force of a spring provided in the device as an example) is applied, and of a large force being generated in the reverse direction in the first roller.
  • skew removal is not appropriately performed by the medium being stretched to the upstream side in the transport direction at a part between the first roller and the second roller.
  • excessive reversal of the first roller or the occurrence of a larger force in the reverse direction is suppressed by the suppression current flowing to the first motor.
  • Skew removal on a medium may be suitably performed in which the medium is reverse transported to the opposite side to the transport direction by reversing the second roller on the downstream side in the transport direction from at least the first roller and the second roller.
  • the suppression current is a hold current that holds the first motor in a stopped state.
  • the hold current flows to the first motor in at least a portion of the skew removal operation period in which the second roller is reversed by the second motor, the first roller is held in the stopped state (that is, a state where the reverse transport amount is zero).
  • the stopped state that is, a state where the reverse transport amount is zero.
  • the suppression current is a reverse current with a value able to cause the first roller to perform reverse transport at a reverse transport amount of the reverse transport amount of the second roller or less, and the controller drives the first motor to reverse by causing the reverse current to flow to the first motor in the process of the skew removal.
  • the first roller is reversed by a reverse transport amount of the reverse transport amount of the second roller or less by the reverse current flowing to the first motor in at least a portion of the skew removal operation period in which the second roller is reversed by the second motor.
  • the first motor is electrically connected by the reverse current flowing, it is possible to suppress an excessive reversal in which the reverse transport amount of the first roller is greater than the reverse transport amount of the second roller, compared to a case of a stop state in which the electrical conduction is disconnected.
  • the bending amount of the medium at the part between the first roller and the second roller is comparatively shortened through the reversal of the first roller. Accordingly, skew removal of the medium can be appropriately performed while suppressing the bending amount of the medium between the first roller and the second roller to be short.
  • the suppression current is a reverse current with a value able to cause the first roller to perform reverse transport at a reverse transport amount of the reverse transport amount of the second roller or less, and the controller drives the first motor to reverse by causing the reverse current to flow to the first motor in the process of the skew removal.
  • reversal of the first roller due to the recovery force that tends to resolve the bending of the medium formed with the first roller by the medium being reverse transported by the second roller is assisted by the reverse current flowing to the first motor, in at least a portion of the skew removal period.
  • reversal of the bending of the first roller is possible using the recovery force of the medium formed by the reversal of the second roller. Since the first roller is reversed using the recovery force of the bending of the medium in this way, it is possible to suppress stretching of the medium due to excessive reversal of the first roller after suppressing the bending of the medium to be short.
  • skew removal of the medium can be appropriately performed while suppressing the bending amount of the medium formed between the first roller and the second roller to be short, in the process of the skew removal.
  • the feed device further preferably includes a hopper on which a medium before feeding is mounted, and that is provided to be displaceable in a state of being biased by an elastic member in a direction approaching the first roller, in which a rotation shaft of the first roller may be interlinked to operate with the hopper via a cam mechanism, and the hopper may be operated by resisting the biasing force of the elastic member via the cam mechanism in the rotation region of the first roller in which the skew removal operation is performed.
  • the hopper in the rotation region of the first roller in which skew removal is performed, the hopper is operated by resisting the biasing force of the elastic member via the cam mechanism.
  • the first roller in at least a part of the skew removal operation period, even if a biasing force due to the elastic member is applied to the first roller, it is possible for the first roller to be suppressed from reversing at a faster excessive reverse transport speed than the reverse transport speed of the second roller. Accordingly, skew removal can be appropriately performed.
  • the first roller is linked to the first motor to be able to transmit force via a one-way clutch, and the controller drives the first motor to reverse by causing a reverse current as the suppression current to flow to the first motor matching the reversal driving of the second motor in at least a part of the skew removal operation period.
  • the reverse driving of the first motor may be able to provide a force in the reverse direction to a one-way clutch, and it is not necessary for the output shaft of the first motor to reversely rotate.
  • the controller matches the reverse driving of the second motor and the first motor is reverse driven by a reverse current as a suppression current flowing.
  • a force in the reverse direction is applied to the one-way clutch.
  • the load from the one-way clutch it is possible for the load from the one-way clutch to be reduced when the feed motor is reversed and for the first roller to be reversed using the recovery force due to bending of the medium.
  • the bending amount of the medium between the first roller and the second roller can be suppressed to be short, and skew removal operation can be appropriately performed while reducing damage such as folding of the medium caused by an excessive bending amount.
  • the controller drives the first motor to reverse by causing the reverse current as the suppression current to flow to the first motor in at least a part of the period in which the medium is nipped in the second roller from the skew removal operation period, and thereafter, at least in a period in which the medium is not nipped by the second roller, and a hold current as the suppression current flows to the first motor.
  • the first motor in at least a part of the period in which the medium is nipped by the second roller in the skew removal operation period, the first motor is reverse driven by the reverse current flowing to the first motor. Therefore, by the first motor being moderately reversed while suppressing excessive reversal, it is possible to suppress the formation of an excessive bending amount. Therefore, in at least the period in which the medium is not nipped by the second roller, a hold current flows to the first motor. Therefore, even if some external force is applied to the first roller, it is possible for the first roller to be suppressed from excessively reversing.
  • skew removal of the medium can be appropriately performed while suppressing the occurrence of damage such as folding to the medium caused by an excessive folding amount of the medium between the first roller and the second roller.
  • the controller varies the current value to increase and decrease the current by which the first motor is reversed, a plurality of times, in at least a part of the skew removal operation period.
  • Cases where the reverse current is reduced include cases where the current value that flows in a state where the first motor is able to be electrically connected is zero and cases where the hold current at which the reverse speed of the first motor is zeros flows to the first motor.
  • the controller since the controller varies the current value to increase and decrease the current by which the first motor is reversed, a plurality of times, in at least a part of the skew removal operation period, it is possible to repeat the reversal of the first motor due to the formation of the bending of the medium for skew removal and the recovery force of the medium that tends to remove the bend.
  • skew removal of the medium can be appropriately performed while suppressing damage such as folding to the medium caused by an excessive folding amount of the medium between the first roller and the second roller.
  • a recording apparatus including the feed device; and a recording head that performs recording on a medium fed by the feed device.
  • the medium which is fed by the feed device is subjected to recording with the recording head.
  • recording can be appropriately performed on a medium with little skew.
  • FIG. 1 is a perspective view showing a printer in an embodiment.
  • FIG. 2A is a side view showing a feed roller of the embodiment
  • FIG. 2B is the side view showing a feed roller of a comparative example.
  • FIG. 3 is a perspective view showing an automatic feed device.
  • FIGS. 4A to 4C are schematic side view describing the operation of the automatic feed device.
  • FIGS. 5A to 5D are schematic side views showing a condition in which the feed roller and a hopper in the automatic feed device are interlinked via a cam mechanism.
  • FIG. 6 is a block diagram showing the electrical configuration of a printer.
  • FIG. 7 is a graph showing the current value of a first motor and a current value of the second motor in a skew removal operation.
  • FIGS. 8A, 8C, 8E, and 8G are schematic side views showing the skew removal operation of a biting and discharging method
  • FIGS. 8B, 8D, 8F, and 8H are schematic plan views of the same.
  • FIG. 9 is a schematic side view describing a problem point in a case where the bending amount of a sheet between the feed roller and a transport roller pair is excessive.
  • FIG. 10 is a schematic side view showing the skew removal operation in which the bending amount of a sheet between the feed roller and the transport roller pair is appropriately controlled.
  • FIG. 11 is a flowchart showing the feed control accompanying the skew removal operation of a biting and discharge method.
  • FIG. 12A is a graph showing the current value of the first motor in the skew removal operation of a modification example
  • FIG. 12B is a graph showing the current value of the first motor in the skew removal operation of a different modification example to FIG. 12A .
  • the printer 11 is a mobile-type ink jet color printer as an example.
  • An operation panel 13 used by a user for input operations and the like is provided in the front surface (right surface in FIG. 1 ) of the device main body 12 having a thin substantially parallelepiped shape.
  • a display portion 14 formed from a liquid crystal panel and an operation portion 15 consisting of an operation switch group are provided on the operation panel 13 .
  • a plurality of operation switches 15 b and the like operated when selecting power switch 15 a and a desired item on a menu screen of a display portion 14 is included in the operation portion 15 .
  • an automatic feed device 17 (below, simply referred to as “feed device 17 ”) as an example of a feed device including a feed tray 16 on which a sheet P is able to be set in a state of being positioned in the width direction by a pair of edge guides 16 a is provided on the rear surface portion of the device main body 12 .
  • the feed device 17 may be also provided with a set feeding method win which sheets are fed one at a time from a sheet group in a feed power set detachably mounted to the device main body 12 or a roll sheet feed method in which a roll sheet set on the outside or the inside of the device main body 12 is continuously fed, in addition to the hopper method in which the feed tray 16 is provided.
  • a serial printing mechanism is provided in the device main body 12 .
  • the carriage 21 that configures the printing mechanism is provided in a state able to reciprocate in the scanning direction X guided on the guide shaft 22 .
  • the recording head 23 is removed from the lower portion of the carriage 21 .
  • the sheet P is fed by the feed device 17 to a position at which recording by the recording head 23 is possible.
  • the fed sheet P is subjected to printing of text or images or the like on the sheet by ejecting ink droplets from the recording head 23 to the surface of the sheet P in the process in which the carriage 21 moves in the direction X.
  • the printed sheet P is discharged from the discharge port 12 a on the front surface of the device main body 12 , and stacked on a slide-type stacker 24 (sheet discharge tray).
  • the device main body 12 in addition to being able to supply a predetermined voltage in which the alternating current from a commercial AC power source 30 (refer to FIG. 6 ) is converted via an AC adapter, not shown, it is possible to use a battery 28 stored in the device main body 12 as a power source for the printer 11 when mobile or the like.
  • a substantially square box-shaped main body frame 31 that is opened on the upper side and the front side is arranged in the device main body 12 (refer to FIG. 1 ), and is attached to a position of the rear surface side on the inside thereof in a state of having an inclined posture able to incline with the support shaft 33 that positions the square plate-like hopper 32 extending in the width direction (same as the scanning direction X) slightly further upward than both sides in the width direction as a center.
  • a mounting surface portion 32 a on which the sheet is set and a pair of edge guides 16 a able to position the sheet set on the mounting surface portion 32 a in the width direction are provided in the hopper 32 .
  • a guide formation member 34 made of resin having a medium guide surface 34 a able to support the leading edge (lower end portion) of the sheet group of which the upper surface (bottom surface) thereof is mounted (set) on the hopper 32 from the lower side is formed slightly wider than the maximum sheet width in the scanning direction X.
  • One feed roller 35 as an example of the first roller is provided in a state in which the rotation shaft 36 suspended at a position further upward than the guide formation member 34 is fixed is provided at a substantially central position in the width direction further to the downstream side in the feed direction Y than the hopper 32 .
  • the feed roller 35 of the embodiment is configured by a D-shaped roller in which the shape in side view seen from the direction of the axial line thereof has a letter D shape.
  • the outer peripheral surface of the feed roller 35 includes a circular arc surface 35 a able to contact the sheet P on the hopper 32 inclined at the feed position (raising position) and a flat surface 35 b able to separate from the sheet P on the hopper 32 .
  • a retard roller 37 able to rotate in a state of being exposed from the guide formation member 34 and with a smaller diameter than the feed roller 35 is provided at a position on the lower side facing the feed roller 35 .
  • the medium guide surface 34 a is formed on a surface with a gradient slightly rising toward the downstream side in the feed direction in a region up to being nipped by the feed roller 35 and the retard roller 37 .
  • the region in which the sheet is delivered by being nipped by the feed roller 35 and the retard roller 37 is formed on a surface with a gradient that lowers toward the downstream side in the feed direction and the downstream side thereof is a comparatively horizontal flat surface.
  • a plurality of rigs is formed spaced by gaps in the width direction and so as to extend along the transport direction Y, and a medium guide portion 34 b that supports the sheet fed by the feed roller 35 and the retard roller 37 from the lower side is formed by the plurality of ribs.
  • the first motor 40 (feed motor) provided on the lower portion of the right end in FIG. 3 of the main body frame 31 is a power source of the automatic feed device 17 .
  • the power transmission mechanism 38 that transmits power from the first motor 40 to the rotation shaft 36 is arranged on the outside of one (right side in FIG. 3 ) side plate 31 a of the main body frame 31 .
  • the feed roller 35 is rotated by the rotation shaft 36 rotates according to the output of the power transmission mechanism 38 .
  • the power transmission mechanism 38 includes two two-stage gears 41 and 42 and a one-way clutch 43 .
  • a pinion 44 fit to the drive shaft of the first motor 40 meshes with the large diameter portion 41 a of the two-stage gear 41 , and the large diameter portion 42 a of the two-stage gear 42 engages with the small diameter portion 41 b of the two-stage gear 41 .
  • the rotation of the two-stage gears 42 is input to the one-way clutch 43 .
  • the one-way clutch 43 permits only transmission of the rotation force in one direction to the rotation shaft 36 of the feed roller 35 , and does not permit transmission of the rotation force in the opposite direction.
  • a trigger lever 45 is provided in a state able to rotate within a predetermined angle range at a position in the vicinity of the lower side of the one-way clutch 43 , and the leading edge is able to latch with one location on the outer periphery of the one-way clutch 43 .
  • the feed roller 35 is stopped when rotating once from the standby position by the trigger lever 45 latching with the one-way clutch 43 when the feed roller 35 rotates once.
  • a cam mechanism 46 that converts the rotation of the rotation shaft 36 to the inclining operation of the hopper 32 is provided on the other end portion that is the opposite side to the one end portion on the one-way clutch 43 in the rotation shaft 36 , further to the inner surface side than the side plate 31 b on the left side in FIG. 3 .
  • the cam mechanism 46 includes a cam 47 that is fit to the other end portion of the rotation shaft 36 and a cam follower 48 formed to be able to engage with the cam 47 on the other end portion of the hopper 32 .
  • a pair of stoppers 49 provided to be able to retract from the medium guide surface 34 a is provided in a region between the hopper 32 and the feed roller 35 in the transport direction Y in a state of being biased upward by the biasing force of a spring (not shown).
  • the pair of stoppers 49 is at the standby position projecting before feeding, is inserted in the retreated position not projecting from the medium guide surface 34 a so as to permit the delivery of the uppermost sheet P on the hopper 32 in the feeding process, and, thereafter, is arranged projecting at the standby position in order to prevent multiple feeding in which a subsequent sheet P is fed together.
  • the pair of stoppers 49 is formed so that the feed roller 35 is retracted at a predetermined timing in a process of rotating once via the cam mechanism 75 (refer to FIG. 6 ) through the power of the first motor 40 .
  • FIG. 2A shows a side view of feed roller 35 of the embodiment
  • FIG. 2B shows a side view of the feed roller 100 of the comparative example corresponding to the technology of the related art.
  • the feed roller 100 of the comparative example is a D-shaped roller having a circular arc surface 100 a and a flat surface 100 b , similarly to the feed roller 35 shown in FIG. 2A , and the outer diameter from the center of the rotation shaft 101 and to the circular arc surface 100 a is a larger diameter than that in FIG. 2A .
  • the feed rollers 35 and 100 shown in FIGS. 2A and 2B come into contact with the sheet on the hopper with either of the circular arc surfaces 35 a and 100 a , and feeding of the sheet is possible with a segment of the circular arc surface.
  • the feed rollers 35 and 100 lower the hopper via the cam mechanism 46 by resisting the elastic force of the compression spring 51 (refer to FIGS. 4A to 4C ) until returning to the standby state in the same drawing by rotating once. At this time, the biasing force in the reverse direction is applied to the rotation shaft 36 according to the elastic force of the compression spring 51 of the hopper.
  • the entire region in the circumferential direction of the circular arc surface 35 a is the feed usage region FA 1 used in feeding until completion of the biting operation of the medium.
  • the hopper retreat region HA 1 that is the process in which the hopper 32 is retreated (lowered) from the feed position to the standby position by resisting the biasing force of the compression spring 51 overlaps the termination end side of the feed usage region FA 1 . Therefore, it is possible for the peripheral distance of the circular arc surface 35 a of the feed roller 35 to be shorter than the peripheral distance of the circular arc surface 100 a of the comparative example and the feed roller becomes comparatively small (reduced diameter) compared that of the comparative example.
  • the first motor 40 is stopped in a state in which the leading edge of the sheet P is not nipped by the transport roller pair 53 (refer to FIGS. 4A to 4C ) as an example of the second roller in the hopper retreat region HA. Therefore, there is concern of the sheet P being excessively reverse transported by the feed roller 35 being suddenly reversed according to the biasing force of the compression spring 51 .
  • the reverse transport of the sheet P is a cause of reduction in the skew removal effect, and lowering of the cuing position precision in which the sheet is stopped at the printing start position (cuing position).
  • countermeasures that suppress reduction of the skew removal effect or lowering of the cuing position precision are performed according to the motor control. The details of the motor control will be described later.
  • the hopper 32 arranged obliquely is supported in a state able to incline in a range of a predetermined angle with the support shaft 33 of the part close the upper side thereof as the center.
  • the hopper 32 is biased in a direction (upward left direction in FIGS. 4A to 4C ) approaching the feed roller 35 by the compression spring 51 interposed with the support member 50 fixed to the main body frame 31 .
  • the feed roller 35 is arranged in the vicinity of the lower end of the hopper 32 in a state in which the rotation shaft 36 is rotatable around the center.
  • the sheet P is set in a state in which the rear surface thereof is supported on the mounting surface portion 32 a , and the leading edge (lower end portion) thereof is supported on the medium guide surface 34 a in the hopper 32 .
  • the hopper 32 reciprocates between the standby position shown in FIGS. 4A to 4C separated from the feed roller 35 and the feed position shown in FIG. 4B at which the set sheet P is able to contact the feed roller 35 .
  • a retard roller 37 that, with the feed roller 35 , delivers the uppermost sheet P is arranged at a location facing the feed roller 35 .
  • the retard roller 37 able to be driven to rotate and is biased by a spring, not shown, in a direction approaching the feed roller 35 in a state in which a fixed rotation load is applied by a torque limitation mechanism such as a torque limiter.
  • a torque limitation mechanism such as a torque limiter.
  • a transport roller pair 53 and a discharge roller pair 54 are respectively arranged at each position on the upstream side and the downstream side with the support stand 55 interposed in the transport direction Y further to the downstream side in the transport direction (feed direction) than the delivery position by the feed roller 35 and the retard roller 37 .
  • a support stand 55 is arranged further to the lower side than the transport path of the sheet P, and at least supports a part of the sheet P on which printing is performed by the recording head 23 .
  • a sheet detector 56 (sheet presence sensor) able to detect the presence of a sheet in the transport path is provided at a position between the feed roller 35 and the transport roller pair 53 .
  • the sheet detector 56 includes a lever 57 in which the lower end thereof extends with a length that reaches the sheet transport path, and an optical sensor portion 58 in which the lower end portion of the lever 57 is a detection target.
  • the sheet detector 56 is turned off by the lever 57 returning to the origin position shown in FIGS.
  • the position of the sheet P in the transport direction Y is managed with the sheet position when the sheet detector 56 detects the leading edge of the sheet P and turned on as a standard (for example, origin point).
  • a skew removal operation is performed accompanying the reverse transport to the upstream side in the transport direction of the sheet P by the reversal of the transport roller pair 53 in order to remove the skew (slant) in which the sheet P is obliquely inclined with respect to the transport path during the feed operation.
  • the transport roller pair 53 and the discharge roller pair 54 are driven by the second motor 60 (transport motor) (refer to FIG. 6 ) as a power source.
  • Each roller pair 53 and 54 is configured, respectively, by driving rollers 53 a and 54 a that rotate and drive with the power of the second motor 60 , and driven rollers 53 b and 54 b that come in contact with and rotate together with the driving rollers 53 a and 54 a , respectively.
  • the sheet P is transported to the transport direction Y in a state of being pinched (nipped) at two locations in the transport direction Y by both roller pairs 53 and 54 .
  • a sheet width sensor 59 is provided at a position further to the upstream side in the transport direction Y than the recording head 23 in the carriage 21 .
  • the sheet width sensor 59 is an optical sensor that detects reflection light of light irradiated toward the support stand 55 , and detects the leading edge of the sheet P by the carriage 21 standing by at a position at which the sheet P is fed, and detects the side edges in the scanning direction X (width direction) of the sheet during movement in the scanning direction X of the carriage 21 .
  • the biting operation in which the leading edge is bitten by the transport roller pair 53 in a state in which the leading edge of the sheet P fed from the hopper 32 is nipped by the transport roller pair 53 and projected by a predetermined length to the downstream side during the feeding process of cuing at the printing start position.
  • the discharging operation is performed by reverse transporting the sheet P to the upstream side in the transport direction, releasing the nipping of the sheet P by the transport roller pair 53 and discharging the leading edge thereof from the transport roller pair 53 to the upstream side in the transport direction Y.
  • the skew (slant) of the sheet P is removed using the recovery force due to the bending of the sheet P according to the discharge operation of the sheet P.
  • the carriage 21 reciprocates an upper position that faces the transport path of a part between the transport roller pair 53 and the discharge roller pair 54 along the scanning direction X (direction orthogonal to the paper surface in FIGS. 4A to 4C ).
  • An ink cartridge 27 in which ink is accommodated is detachably mounted to the carriage 21 . Ink supplied from the ink cartridge 27 is ejected from the nozzles of the recording head 23 toward a part of the sheet P supported by the support stand 55 .
  • serial printer 11 text and images or the like are printed on the sheet P by substantially alternately repeating a printing operation of performing one scan by ejecting ink from the recording head 23 to the sheet P during scanning of the carriage 21 , and a transport operation of transporting the sheet P to the next recording position.
  • the printer 11 is a serial printer in which the recording head 23 is moved in the scanning direction as an example, a line printer having a line head configured by a single or head group with a long shape may be used.
  • the cam 47 fixed to one end portion of the rotation shaft 36 has a substantially circular arc first cam surface 47 a formed with a substantially fixed diameter from the rotation shaft 36 as a part able to hold the hopper 32 to the standby position.
  • the end surface on the opposite side in the cam rotation direction (clockwise direction in FIGS. 5A to 5D ) of the cam 47 is the second cam surface is the second cam surface 47 b .
  • the second cam surface 47 b is a surface that intersects the circumferential direction of the feed roller 35 .
  • a part of on the leading edge side of the cam 47 in the cam rotation direction is projected in a triangular shape, and the inner peripheral surface close to the rotation shaft 36 of the triangular part thereof is the third cam surface 47 c.
  • the feed roller 35 rotates in a state in which the cam 47 and the cam follower 48 are not engaged, that is, in a state in which the hopper 32 is held to the feed position, and the sheet P is further fed.
  • a biting operation in which the leading edge of the sheet P is nipped by the transport roller pair 53 in a state where only a predetermined length is projected to the downstream side and a discharging operation in which the leading edge of the sheet P is discharged by reversal of the transport roller pair 53 .
  • the feed roller 35 receives a force in the reverse direction due to the biasing force of the compression spring 51 transferred via the cam mechanism 46 .
  • the one-way clutch 43 (refer to FIG.
  • the recording head 23 , the carriage motor 71 , the first motor 40 and the second motor 60 , as an output system, are electrically connected to the controller 70 as a controller provided in the printer 11 .
  • the sheet detector 56 , the sheet width sensor 59 , the linear encoder 72 and the encoders 73 and 74 (rotary encoders), as an input system, are electrically connected to the controller 70 .
  • the linear encoder 72 outputs the detection pulse signal having a number of pulses compared to the rotation amount of the carriage motor 71 .
  • the encoder 73 outputs the detection pulse signal having a number of pulses compared to the rotation amount of the first motor 40 .
  • the encoder 74 further outputs the detection pulse signal having a number of pulses compared to the rotation amount of the second motor 60 .
  • the sheet detector 56 detects the leading edge of the sheet P at a predetermined position on the feed path, and the position when the leading edge is detected is used as the origin point when measuring the position (transport position) in the transport direction Y of the sheet P.
  • the measured transport position of the sheet P is used in control of the first motor 40 and the second motor 60 that performed the skew removing operation that removes skew (slant) of the sheet P, described later.
  • the sheet width sensor 59 is provided on the carriage 21 and is a reflection-type optical sensor able to detect the side edge of the sheet P by moving in the X direction while irradiating detection light toward the support stand 55 , detection of the width of the sheet P and of the leading edge in the transport direction Y is possible based on the detection signal thereof.
  • the transport position of the sheet in which the position at which the leading edge is detected by the sheet detector 56 is the origin point, shifts from the actual position of the sheet P due to the subsequent skew removal operation, when cuing of the sheet P is performed based on the transport position thereof, the cuing position precision is lowered. In this case, if cuing is performed with the position at which the leading edge of the sheet P is detected by the sheet width sensor 59 as a standard, the necessary cuing position precision is ensured.
  • the controller 70 shown in FIG. 6 includes a computer 80 , a power source device 81 , a head driving circuit 82 , and motor driving circuits 83 to 85 .
  • the power source device 81 inputs a predetermined voltage of direct current in which alternating current from a commercial AC power source 30 is transformed, rectified or the like via an AC adapter, and supplied each direct current in which a necessary plurality of voltages is transformed to each driving circuit 82 to 85 , the display portion 14 , a computer 80 or the like.
  • the power source device 81 similarly supplies each direct current in which direct current input from a battery 28 is transformed to a necessary predetermined voltage to each driving circuit 82 to 85 or the like, when the printer 11 has a battery mode.
  • the computer 80 includes a CPU 91 , an application specific IC (ASIC) 92 , a nonvolatile memory 93 and a RAM 94 .
  • Various programs including a program for feed control indicated by the flowchart in FIG. 11 and necessary setting data or the like are stored in the nonvolatile memory 93 .
  • Programs executed by the CPU 91 and data such as various calculation results are temporarily stored in the RAM 94 .
  • the CPU 91 executes programs read out from the nonvolatile memory 93 , performs printing control that is the start of feed control performed by the printer 11 , and administers control of the printer 11 .
  • the CPU 91 controls driving of the carriage motor 71 , first motor 40 , and second motor 60 via each of the motor driving circuits 83 to 85 during printing control. More specifically, the CPU 91 causes a current to flow to the motors 40 , 60 , and 71 according to each command value by outputting the respective command values to each motor driving circuit 83 to 85 .
  • the command value is output with the pulse width modulation (PWM) signal, and a current flows to each motor 40 , 60 , and 71 according to the duty ratio of the PWM signal (ratio of the pulse width with respect to the cycle of the PWM signal).
  • the CPU 91 performs various processes based on the operation signal from the operation portion 15 , and performs display control in which a menu screen, setting screen and the like are displayed on the display portion 14 via a display driving circuit, not shown.
  • the ASIC 92 administers the ink ejection control of the recording head 23 by performing data processing in which the necessary head control data in order for the recording head 23 to perform ink ejection is generated from image data included in the printing data PD, and outputting the generated head control data to the head driving circuit 82 .
  • the ASIC 92 inputs the detection pulse signal of each encoder 72 to 74 , and counts the respective number of pulse edges with three internal counters. Each of the three counters increments the counted value by “1” at a time during forward driving of the motors that are the respective target, and decrements the counted value by “1” at a time during reversal of the motors.
  • the ASIC 92 acquires the count value in which the number of pulse edges of the detection pulse signal from the linear encoder 72 with the internal CR counter (not shown) is counted, and that indicates the position in the direction X of the carriage 21 .
  • the ASIC 92 acquires the count value in which the number of pulse edges of the detection pulse signal from the encoder 73 with the internal ASF counter (not shown) is counted, and that indicates the rotation position of the carriage 35 .
  • the ASIC 92 further acquires the count value in which the number of pulse edges of the detection pulse signal from the encoder 74 with the internal PF counter (not shown) is counted, and that indicates the transport position of the sheet P in which when the leading edge of the sheet P is detected by the sheet detector 56 is made the origin point.
  • the CPU 91 performs drive control of the carriage motor 71 and performs speed control and position control of the carriage 21 by outputting the motor command value according to the carriage position ascertained from the counted value of the CR counter to the motor driving circuit 83 .
  • the CPU 91 performs drive control of the first motor 40 and feed control of the feed device 17 by outputting the motor command value according to the feed position of the sheet ascertained from the counted value of the ASF counter to the motor driving circuit 84 .
  • the feed roller 35 rotates in one direction (feed direction) only according to the power transmitted from the first motor 40 to the rotation shaft 36 via the power transmission mechanism 38 ( FIG. 3 ) including the one-way clutch 43 .
  • the hopper 32 moves between the standby position and the feed position through the power in which the rotation of the rotation shaft 36 is converted via the cam mechanism 46 .
  • the pair of stoppers 49 (in FIG. 6 , only one not shown) moves between the retreated position at which delivery of the sheet P on the hopper 32 is permitted and the standby position at which multiple feeding of the sheet P is stopped by preventing feeding of subsequent sheets P of the one delivered sheet P through the power in which the rotation output from the first motor 40 is converted via the cam mechanism 75 .
  • the CPU 91 further performs drive control of the second motor 60 and transport control of the transport roller pair 53 by outputting the motor command value according to the transport position of the sheet ascertained from the counted value of the PF counter to the motor driving circuit 85 .
  • the CPU 91 is able to ascertain the movement amount of the carriage 21 from variations in the counted value of the CR counter, and able to ascertain the reverse transport value to the downstream side in the transport direction of the sheet P and to the upstream side in the transport direction of the sheet P from variations in the counted value of the PF counter.
  • Examples of the host device (not shown) that forwards the printing data PD to the printer 11 include mobile terminals such as smartphones, mobile telephones, table PCs, and mobile information terminals ((personal digital assistants) PDA), in addition to personal computers.
  • the skew removal control is formed from a biting operation, a discharging operation and a re-biting operation.
  • the biting operation is an operation in which the feed roller 35 and the transport roller pair 53 are forward rotated, and the leading edge of the sheet P is nipped (bitten) by the transport roller pair 53 in a state in which a predetermined amount is projected to the downstream side in the transport direction.
  • the discharging operation is an operation in which the leading edge of the sheet P is discharged to the upstream side in the transport direction by the transport roller pair 53 being reversed.
  • the re-biting operation is an operation in which the leading edge of the sheet P is again bitten by the transport roller pair 53 by the transport roller pair 53 being forward rotated.
  • a positive direction current flows to the first motor 40 and a positive direction current flows to the second motor 60 .
  • the rotation of the feed roller 35 and the transport roller pair 53 is gradually reduced by the motor currents I 1 and I 2 being gradually reduced.
  • a current with a reverse orientation next flows.
  • the discharge operation is performed by reversing the transport roller pair 53 by a negative orientation current flowing to the second motor 60 .
  • the reverse step control in which the first motor 40 is reversed by the negative orientation reverse current Ir 1 flowing to the first motor 40 is performed.
  • the reverse step control is control in which a reverse current Ir 1 with a reverse orientation also flows to the first motor 40 between the start of the discharging operation and a predetermined number of steps.
  • the predetermined number of steps corresponds to the number of steps until a biting amount portion of the sheet is discharged in the biting operation, is the number of steps in which it is possible to discharge the entire leading end of the sheet P even if the maximum skew is assumed, and this is the number of steps of the biting amount portion in the biting operation or a value of the number of steps thereof or more.
  • the execution period of the reverse step control maybe at least a portion period of the period in which the sheet P in the execution period of the discharging operation that is an example of the skew removing operation is nipped by the transport roller pair 53 .
  • synchro control is performed in which the reverse driving of the first motor 40 and the reverse driving of the second motor 60 are synchronized. That is, the computer 80 performs driving control of the first motor 40 and the second motor 60 while obtaining synchronization in which the reverse transport speed V 1 (or reverse transport amount) of the sheet P by the feed roller 35 is suppressed to the reverse transport speed V 2 (or reverse transport amount) of the sheet P by the transport roller pair 53 or lower.
  • the respective the velocities V 1 and V 2 of the feed roller 35 and the transport roller pair 53 indicate the medium transport speed at which the medium is able to be transported to the upstream side in the transport direction by reversal of each roller 35 and 53 a , and is a value in which the peripheral speed of the outer peripheral surface of each roller 35 and 53 a are compared, with reference to the respective rotation speeds of the rollers 35 and 53 a and the differences in roller diameter.
  • the reverse transport speeds V 1 and V 2 indicate the reverse transport amount per unit time.
  • the unit time for example, is 1 second.
  • the first motor 40 and the second motor 60 are synchronized and alternately driven in a predetermined cycle.
  • the first motor 40 and second motor 60 are controlled so that the reverse transport speeds do not satisfy the above conditions in the same cycle of the synchro control and the reverse transport speed per unit time (for example, one second) in the discharge operation period that is the average reverse transport speed in a plurality of cycles satisfies the above conditions. That is, the first motor 40 and second motor 60 may be drive controlled so that the reverse transport speed V 1 of the feed roller 35 and the reverse transport speed V 2 of the transport roller pair 53 are speed controlled with conditions (V 1 ⁇ V 2 ) at which stretching of the sheet P does not arise at the part between the feed roller 35 and the transport roller pair 53 .
  • the discharging operation of the related art discharges the sheet by reversing the transport roller pair by reverse driving the second motor in the stopped state of the feed roller in which electrical connection with the first motor is cut off. In so doing, bending of the sheet is formed between the transport roller pair and the feed roller, and skew of the sheet P is removed using the recovery force (stiffness of the sheet) of the bending.
  • the discharge operation is performed in the hopper lowering region (hopper retreat region).
  • a suppression current that suppresses excessive reversal of the feed roller 35 caused by the biasing force of the compression spring 51 flows to the first motor 40 in the discharging operation process.
  • the hold current Ih flows to the first motor 40 in the discharging process and holds the first motor 40 in the stopped state. Therefore, even if the force in the reverse direction acts on the rotation shaft 36 by the biasing force of the compression spring 51 of hopper 32 , the feed roller 35 is held in a substantially stopped state by the connection of the hold current Ih to the first motor 40 , and even if temporarily reversed, the feed roller 35 is suppressed to a low reverse transport speed of the reverse transport speed or lower due to the transport roller pair 53 .
  • the sheet P being reverse transported by the feed roller 35 at a larger reverse transport amount than the reverse transport amount of the transport roller pair 53 is eliminated, and there is no stretching to the upstream side in the transport direction in a state where the sheet P has no bending. In so doing, bending of the sheet P between the feed roller 35 and the transport roller pair 53 is formed, and it is possible for skew of the sheet P to be removed using the recovery force (stiffness of the sheet) of the bending.
  • the reverse transport speed V 1 of the feed roller 35 basically becomes zero, and the condition V 1 ⁇ V 2 is achieved.
  • the transport space of the sheet P between the nip point of the feed roller 35 and the retard roller 37 and the nip point of the transport roller pair 53 is comparatively narrow.
  • the medium guide portion 34 b includes an inclined portion 34 c that lowers from the nip position of the feed roller 35 and the retard roller 37 along the downstream side in the feed direction and a flat portion 34 d that extends substantially horizontally connected to the downstream side in the feed direction of the inclined portion 34 c .
  • a guide roller 61 and a medium guide plate 62 are provided at positions (upper side in FIGS.
  • the first motor 40 is reverse driven by performing the reverse step control in which the reverse current Ir 1 (refer to FIG. 7 ) flows to the first motor 40 in the entire or a part of the period in which the leading edge of the sheet P is nipped by the transport roller pair 53 in the discharging operation.
  • the feed roller 35 does not reverse. With only the recovery force (stiffness) of slight bending by which the sheet P being reversed by the reversal of the transport roller pair 53 , it is difficult for the feed roller 35 on which there is a load from the one-way clutch 43 to be reversed.
  • the load is reduced when the feed roller 35 is reversed. That is, the load is reduced by a force in the reverse direction being generated on the output shaft of the first motor 40 by the reverse current Ir 1 flowing to the first motor 40 , and the force in the reverse direction being applied to the one-way clutch 43 , and reversal of the feed roller 35 is assisted through the recovery force (stiffness) of the bending of the sheet P.
  • the synchro control shown in FIG. 7 may be performed a fixed reverse current Ir 1 continuously flowing to the first motor 40 , or may be performed by the reverse current Ir 1 intermittently flowing.
  • synchro control is performed by the reverse current Ir 2 able drive in the reverse direction intermittently flows to the second motor 60 , and the reverse current Ir 1 intermittently flowing to the first motor 40 flowing thereto.
  • bending forming driving in which bending of the sheet P is formed at the part between the feed roller 35 and the transport roller pair 53 is performed by, first, only the second motor 60 is reverse driven, the sheet P is reverse transported by the transport roller pair 53 being reversed with the feed roller 35 in a stopped state.
  • bending resolution driving that resolves the bending of the sheet P is performed by the feed roller 35 being reversed according to the recovery force of the bending of the sheet P by only the first motor 40 being reverse driven, and the load being reduced by applying the force in the reverse direction to the one-way clutch 43 .
  • the synchro control is performed by alternately repeating the bending forming driving by the transport roller pair 53 based on the reverse driving of the second motor 60 and the bending resolution driving by the feed roller 35 based on the reverse driving of the first motor 40 .
  • the controller 70 speeds and slows the reversal speed of the first motor 40 by repeating the variations in the current value in which the reverse current Ir 1 that flows to the first motor 40 is periodically increased and decreased a plurality of times.
  • the reverse current Ir 1 of the first motor 40 and the reverse current Ir 2 of the second motor 60 are the pulse currents that are strictly shifted by a half cycle from one another.
  • the cycle for each half cycle in which the reverse current Ir 1 flows is an extremely short time, the reversal of the feed roller 35 is suppressed by the biasing force of the compression spring 51 .
  • the hold current Ih may flow in the period for each half cycle in which the reverse current Ir 1 does not flow.
  • the frequency of pulse current in which the reverse currents Ir 1 and Ir 2 are alternately connected in the execution period of the synchro control is a predetermined Hz within a range of 10 to 100 Hz, as an example.
  • the frequency of the pulse current of the synchro control may be less than 10 Hz or may exceed 100 Hz.
  • the cycle of the pulse current of the synchro control is longer than the PWM cycle when the computer 80 controls motor driving circuits 84 and 85 corresponding to the respective motors 40 and 60 , and a plurality of PWM signals from one cycle of the pulse current of the synchro control is output to the motor driving circuits 84 and 85 .
  • the skew removal control is formed from three operations of a biting operation, a discharging operation and a re-biting operation.
  • the biting operation is performed in which the sheet P is transported to a position projected by a predetermined length (biting amount) from the transport roller pair 53 to the downstream side in the transport direction Y.
  • biting amount a predetermined length (biting amount) from the transport roller pair 53 to the downstream side in the transport direction Y.
  • the feed roller 35 and the transport roller pair 53 being forward rotated by the first motor 40 and second motor 60 being forward driven, the sheet P is fed in the delivery direction.
  • the PF counter counts the transport position of the sheet P with the detection position as the origin point.
  • the leading edge of the sheet P is stopped once motors 40 and 60 are driven by the number of steps corresponding to the biting amount from the nip position of the transport roller pair 53 according to the counted value of the PF counter. In this way, the biting operation is performed.
  • the transport roller pair 53 is reversed, thereby discharging the sheet P to the upstream side in the transport direction.
  • synchro control is performed in which the first motor 40 and second motor 60 are synchronized and reversed driven by the predetermined number of steps, and the feed roller 35 and the transport roller pair 53 are synchronized and reversed in order to the adjust the bending amount to be small.
  • the reverse transport speed V 1 (or reverse transport amount) of the feed roller 35 is suppressed to the reverse transport speed V 2 (or reverse transport amount) of the transport roller pair 53 or less.
  • the reverse transport speed V 1 of the feed roller 35 and the reverse transport speed V 2 of the transport roller pair 53 are the same.
  • the predetermined number of steps is set to a value corresponding to the biting amount, and the sheet P is reverse transported until the nipping of the transport roller pair 53 is released, as shown in FIGS. 8E and 8F according to the synchro control.
  • the bending amount is the permitted amount in which folding does not occur shown in FIG. 9
  • the bending forming driving and the bending resolution driving maybe performed one at a time.
  • the bending forming driving and the bending resolution driving may be performed at the same time, and the control in which these are repeated may be performed.
  • the second motor 60 is reverse driven with the first motor 40 in a stopped state.
  • a discharging amount able to discharge the sheet P from the transport roller pair 53 is set, and only the transport roller pair 53 is reverse driven for a while even if the nipping of the sheet P is released.
  • the skew is substantially removed with the process of synchro control, by the sheet being discharged from the transport roller pair 53 with the feed roller 35 in a stopped state, if bending is formed at this state, the leading edge of the sheet P is not at the nip point of the transport roller pair 53 with the recovery force by which the bend sheet P tends to return, and the skew of the sheet P is further removed.
  • the re-biting operation is performed. That is, the first motor 40 and second motor 60 are forward driven, the re-biting operation is started according to the forward rotation of the feed roller 35 and the forward rotation of the transport roller pair 53 , and the sheet P is transported to a re-biting position projected by a predetermined amount to the downstream side in the transport direction by the nip position by the nip position of the transport roller pair 53 . Thereafter, the sheet P is further transported to the downstream side by the forward rotation of the transport roller pair 53 , and cued to the printing start position.
  • the feed control will be described with reference to the flowchart shown in FIG. 11 .
  • the computer 80 starts the following feed control.
  • the feed speed and the skew removal method are determined according to the mode (power source mode and printing mode) at this time. For example, if the biting and discharging method is the selected method, the feed control that accompanies the skew removal according to the biting and discharging method shown in FIGS. 8A to 8H is performed.
  • Step S 11 the first and second motors are forward driven, and the biting operation of the sheet is performed.
  • step S 12 it is determined whether or not the leading edge of the sheet is detected. If the leading edge of the sheet is detected by the sheet detector 56 , the process proceeds to step S 13 , and if the leading edge of the sheet is not detected, the process returns to step S 11 . During execution of the biting operation, when the leading edge of the sheet is detected (positive determination in S 12 ), the process proceeds to step S 13 .
  • step S 13 forward driving of the first and second motors continues until the sheet reaches the biting position and stops. From the point at which the leading edge of the sheet is detected by the sheet detector 56 , the number of steps is obtained for each motor 40 and 60 according to the biting amount according to the size and paper type of the sheet at this time. When the first motor 40 and second motor 60 are forward driven by the respective number of steps from the point in time of detection of the leading edge of the sheet by the sheet detector 56 , the driving of each motor 40 and 60 is stopped.
  • step S 14 the first and second motors are synchro driven in the reverse direction and the discharging operation of the sheet is performed.
  • the synchro control not only the second motor is revere driven, but also the first motor is reverse driven.
  • the transport distance L 1 of the sheet P by the reverse driving of the first motor 40 is set to the reverse transport distance L 2 of the sheet by the reverse driving of the second motor 60 or less (L 1 ⁇ L 2 ).
  • the first motor 40 and the second motor 60 are synchronized and reverse driven so that the transport conditions (L 1 ⁇ L 2 ) are satisfied during discharging.
  • the sheet P is reverse transported by the reverse transport distance L 2 by the transport roller pair 53 , and, in so doing, slight bending arises at a part of the sheet P between the transport roller pair 53 and the feed roller 35 .
  • the first motor 40 is reverse driven for a predetermined time in which the feed roller 35 is able to be reversed by the reverse transport distance L 1 with the force of the stiffness due to the bending of the sheet P.
  • step S 15 it is determined whether or not the transport roller nips the sheet. If the transport roller nips the sheet, the process returns to step S 14 , and when the transport roller does not nip the sheet, the process proceeds to step S 16 . In this way, the synchro control is performed until the nipping of the transport roller pair 53 is released.
  • step S 16 the first motor is hold controlled, and the reverse driving of the second motor continues. That is, hold control that holds the first motor 40 in the stopped state is performed by the hold current Ih flowing to the first motor 40 .
  • hold control that holds the first motor 40 in the stopped state is performed by the hold current Ih flowing to the first motor 40 .
  • the rotation shaft 36 receives a force in the reverse direction due to the biasing force of the compression spring 51 of the hopper 32 partway through the retreat operation (lowering operation) of the hopper 32 by the engagement of the cam 47 and the cam follower 48 .
  • reverse driving of the transport roller pair 53 is performed in a state in which the feed roller 35 in which the reversal is suppressed is held in the stopped state.
  • step S 17 it is determined whether or not the skew removal is completed. That is, it is determined whether or not the second motor 60 reaches the number of reverse steps for discharging. If the skew removal is completed, the process proceeds to step S 18 , and if the skew removal is not completed, the process returns to step S 16 .
  • the reversal of the transport roller pair 53 is continued until the discharge operation completes by the reaching the number of reversal steps for discharging, and when the discharging operation completes by reaching the number of reversal steps for discharging, the process proceeds to step S 18 .
  • step S 18 reverse driving of the second motor is stopped.
  • the reversal of the transport roller pair 53 is stopped by the reverse driving of the second motor 60 being stopped, and the skew removal operation is finished.
  • step S 19 the first and second motors are forward driven, and the re-biting operation is performed. That is, the first motor 40 and second motor 60 being forward driven, the re-biting operation in which the leading end of the sheet P temporarily discharged is nipped again by the transport roller pair 53 is performed.
  • the re-biting operation is a portion of the cuing operation, and in the example, the operation in the process of again being nipped by the transport roller pair 53 that is a process from the cuing operation in which feeding is performed by the feed roller 35 is referred to as the re-biting operation.
  • step S 20 it is determined whether or not the feed roller reaches the standby position.
  • the rotation position of the feed roller is ascertained based on the value of the ASF counter in which the number of pulse edges of the detection pulse signal of the number of the pulses according to the rotation amount of the first motor 40 is counted.
  • the value of the ASF counter reaches the value corresponding to the standby position, it is determined that the feed roller 35 reaches the standby position. If the feed roller 35 reaches the standby position, the process proceeds to step S 21 , and if the feed roller 35 does not reach the standby position, the process returns to step S 19 , and the re-biting operation in step S 19 continues.
  • step S 21 forward driving of the first motor is stopped. That is, the feed roller 35 is stopped at the standby position by forward driving of the first motor 40 being stopped. When the feed roller 35 returns to the standby position by rotating once, the feed roller 35 stops at the standby position at a timing slightly before the stopping of driving of the first motor by the trigger lever 45 engaging with the one-way clutch 43 , thereby cutting off the transmission of the power of the first motor 40 to the rotation shaft 36 .
  • step S 22 the forward driving of the second motor continues, and the sheet is cued. That is, the forward driving of the second motor 60 continues, and the sheet P is transported to the cuing position (printing start position).
  • the value of the PF counter that counts the value of the transport position of the sheet P in which the position when the leading edge of the sheet is detected by the sheet detector 56 is made the reference (zero (0)) reaches the value corresponding to the cuing position, the forward driving of the second motor 60 is stopped. As a result, the sheet P is cued to the printing start position.
  • the controller 70 causes the reverse current Ir 1 and the hold current Ih to be switched and flow as a suppression current that suppresses the reverse transport speed of the feed roller 35 to the reverse transport speed of the transport roller pair 53 or less with respect to the first motor 40 .
  • the reverse current Ir 1 and the hold current Ih Through the electrical connection of the reverse current Ir 1 and the hold current Ih to the first motor 40 , because the reverse transport amount of the feed roller 35 is suppressed to the reverse transport amount of the transport roller pair 53 or less, and the excessive reversal of the feed roller 35 is suppressed, it is difficult for the sheet P to be stretched to the upstream side in the transport direction at the part between the feed roller 35 and the transport roller pair 53 .
  • the first motor In the stopped state in which the electrical connection of the first motor is cut off, the first motor is easily reversed by an external force, and the force that suppresses the reversal of the feed roller is weakened.
  • the feed roller excessively reversing, and a larger force in the reverse direction being applied to the feed roller in a state in which the sheet is nipped by the transport roller pair according to the biasing force of the compression spring of the hopper.
  • skew removal is not appropriately performed by the medium being stretched to the upstream side in the transport direction at a part between the first roller and the second roller.
  • the reverse current Ir 1 flows to the first motor 40 , and the feed roller 35 reverses by a reverse transport amount of the reverse transport amount of the transport roller pair 53 or less.
  • the biasing force of the compression spring 51 of the hopper 32 is applied to the rotation shaft 36 via the cam mechanism 46 , it is possible to suppress the sheet P being stretched in which the feed roller 35 is excessively reversed by a greater reverse transport amount than the reverse transport amount of the transport roller pair 53 . Accordingly, it is possible for skew removal of the sheet P to be appropriately performed while suppressing the bending amount of the sheet P formed between the feed roller 35 and the transport roller pair 53 to be short.
  • the feed roller 35 is reversed using the recovery force (force of stiffness) that tends to resolve the bending of the sheet P formed with the feed roller 35 by the transport roller pair 53 reversing the sheet P.
  • the controller 70 assists the reversal of the feed roller 35 due to the recovery force of the bending of the sheet P, by the reverse current Ir 1 flowing to the first motor 40 . Therefore, it is possible for the feed roller 35 to be reversed using the recovery force due to the bending formed by the reversal of the transport roller pair 53 .
  • skew removal of the sheet P to be appropriately performed while suppressing the bending amount of the sheet P formed between the feed roller 35 and the transport roller pair 53 to be short in the process of the skew removal operation.
  • the feed device 17 includes a hopper 32 provided to be displaceable in a state in which the sheet P before feeding is mounted and biased by the compression spring 51 (example of an elastic member) in a direction approaching the feed roller 35 .
  • the rotation shaft 36 of the feed roller 35 is interlinked to operate with the hopper 32 via the cam mechanism 46 , and the hopper 32 is operated by resisting the biasing force of the compression spring 51 (example of the elastic member) via the cam mechanism 46 in a rotation region of the feed roller 35 in which skew removal is performed.
  • the feed roller 35 is interlinked to the first motor 40 to be able to transmit force via the one-way clutch 43 , and the first motor 40 is reverse driven matching the reverse driving of the second motor 60 , in at least a part of the skew removal operation period.
  • the first motor 40 is reverse driven matching the reverse driving of the second motor 60 , in at least a part of the skew removal operation period.
  • the first motor 40 is reverse driven, and thereafter, the hold current Ih flows to the first motor 40 in at least the period in which the sheet P is not nipped by the transport roller pair 53 .
  • the hold current Ih flows to the first motor 40 in at least the period in which the sheet P is not nipped by the transport roller pair 53 .
  • the controller 70 performs synchro control by advancing and delaying the reversal speed by repeating the variations in the current value in which the reverse current of the first motor 40 is increased and decreased a plurality of times in at least a part of the skew removal operation period.
  • the controller 70 performs synchro control by advancing and delaying the reversal speed by repeating the variations in the current value in which the reverse current of the first motor 40 is increased and decreased a plurality of times in at least a part of the skew removal operation period.
  • the printer 11 includes a feed device 17 , and a recording head 23 that executes recording on the sheet P fed by the feed device 17 .
  • a feed device 17 In the feeding process of the sheet P by the feed device 17 , it is possible for skew removal of the sheet P to be appropriately performed in which the sheet P is reverse transported by the transport roller pair 53 being reversed. As a result, printing by the recording head 23 is performed on the sheet P without skew, and a printed matter is provided with little position shifting with respect to the sheet P.
  • hold control in which the reverse step control of the first motor 40 in the embodiment is replaced with the hold control and a hold current Ih as an example of a suppression current flows in the entire region of the discharging operation period may be performed.
  • reverse step control in which the hold control of the first motor 40 in the embodiment is replaced with the reverse step control and a reverse current Ir 1 as an example of a suppression current flows in the entire region of the discharging operation period may be performed.
  • the period in which the reverse current Ir 1 flows is not limited to the entire period in which the sheet P is nipped by the transport roller pair in the skew removal operation period, and may be a part thereof.
  • the control force works by a counter electromotive force generated by the rotation being input to the first motor 40 when the feed roller 35 receiving the force by which the hopper 32 is moved to the rising side with the biasing force of the compression spring 51 via the cam mechanism 46 is reversed, it is possible to suppress the reversal of the feed roller 35 to be small.
  • the induction current generated in the first motor according to the reversal of the feed roller 35 may be a suppression current.
  • skew removal methods may be employed.
  • a reverse butting method in which the medium fed by the feed roller 35 being forward rotated butts on the reversed transport roller pair 53 may be employed.
  • the force that works on and reverses the feed roller 35 as an example of a first roller is not limited to a biasing force due to a spring (example of the elastic member) of the hopper.
  • a configuration may be employed in which the biasing force of another member other than the hopper works on the feed roller. That is, if the biasing force that biases a member that is a member driven via the cam mechanism having a cam that rotates interlinked with the rotation shaft of the feed roller in one direction has a configuration that acts as a force in the reverse direction of the first roller in at least a part of the skew removal operation period, the member may be another member other than the hopper.
  • a configuration may be employed in which the feed roller 35 as an example of the first roller does not receive the biasing force.
  • the medium reverse transported by the second roller have a comparatively high rigidity, such as a thick paper
  • the first roller excessively rotates by receiving a comparatively strong reverse transport force from the medium.
  • Excessive reversal of the first roller due to this kind of reverse transport force being received from the medium is also a cause that interferes with the appropriate skew removal.
  • the suppression current hold current Ih or reverse current Ir 1
  • a feed roller 100 may be used in which the feed usage region FA 2 and the hopper retreat region HA 2 do not overlap at all. Even in this case, in a case in which the rotation shaft receives a force in the reverse direction due to another cause other than the hopper 32 in the discharge operation period, because the medium slips in the feeding process or variations arise the feed start timing of the medium, even in cases where the discharge operation period enters the hopper retreat region HA 2 , it is possible to appropriately perform the skew removal.
  • the one-way clutch may not be provided.
  • the elastic member that biases the hopper is not limited to a coil spring. Other types of spring, such as a torsion coil spring, a plate spring and a wire spring may be used.
  • the elastic member may be rubber.
  • the current may continuously flow to the first motor 40 , thereby performing reverse driving.
  • the first motor 40 Before the sheet P is discharge to the upstream side in the transport direction from the transport roller pair 53 (that is, when nipped by the transport roller pair 53 ), the first motor 40 is stopped without a current flowing to the first motor 40 . In the period after the sheet P is discharged to the upstream side in the transport direction from the transport roller pair 53 (that is, period when not nipped by the transport roller pair 53 ), the hold current Ih may flow to the first motor 40 . According to the configuration, if the nipping force of the sheet P by to the transport roller pair 53 is stronger than the biasing force of the compression spring 51 , even though a great force is applied to the feed roller 35 in the reverse direction due to the biasing force of the compression spring 51 , the feed roller 35 is not excessively reversed. In the period in which the nipping by the transport roller pair 53 is released, since the hold current Ih flows to the first motor 40 , it is possible to suppress excessive rotation of the feed roller 35 .
  • the skew removal method may be changed between a battery mode in which the battery is the power source and an AC power source mode.
  • the biting and discharging method may be used during the battery mode, and a reverse butting method may be used during AC power source mode. This may be reversed.
  • the controller that performs the biting and discharging method of skew removal may be realized by software using a CPU that executes a program, may be realized by hardware using an electronic circuit such as an ASIC, or may be realized by cooperation between software and hardware.
  • the printing device may be an ink jet printer, a dot impact printer, or a laser printer.
  • the printing device is not limited to a printer provided with only a printing function, and may be a composite device.
  • the printing device is not limited to a serial printer, and may be a line printer or a page printer.
  • the invention may be applied to a feed device provided in an electronic apparatus other than a recording apparatus such as a printer.
  • the feeding device may feed a medium to be subjected to a work other than recording.
  • Such work may be cutting of a sheet, a work of perforating a sheet, a work folding a sheet, adhering a sheet, or a curing process through ultraviolet irradiation of an ultraviolet curable resin layer on a sheet.
  • a feed device may be used that feeds the medium with the purpose of drying or feeds the medium with the purpose of simply removing skew without performing the work.
  • the medium is not limited to a sheet, and may be a film made from a resin, a metal foil, a metal film, a composite film (laminate film) of a resin and a metal, a fabric, a non-woven fabric, a ceramic sheet or the like.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Registering Or Overturning Sheets (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Ink Jet (AREA)
  • Handling Of Cut Paper (AREA)
US14/739,448 2014-06-25 2015-06-15 Feed device and recording apparatus Active US9573781B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014-130779 2014-06-25
JP2014130779A JP6402508B2 (ja) 2014-06-25 2014-06-25 給送装置及び記録装置

Publications (2)

Publication Number Publication Date
US20150375949A1 US20150375949A1 (en) 2015-12-31
US9573781B2 true US9573781B2 (en) 2017-02-21

Family

ID=54929713

Family Applications (1)

Application Number Title Priority Date Filing Date
US14/739,448 Active US9573781B2 (en) 2014-06-25 2015-06-15 Feed device and recording apparatus

Country Status (3)

Country Link
US (1) US9573781B2 (enrdf_load_stackoverflow)
JP (1) JP6402508B2 (enrdf_load_stackoverflow)
CN (1) CN105269986B (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10953646B2 (en) 2018-10-26 2021-03-23 ACCO Brands Corporation Laminating system with coded film cartridge

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6888261B2 (ja) 2016-09-30 2021-06-16 セイコーエプソン株式会社 記録装置
JP6880919B2 (ja) * 2017-03-29 2021-06-02 セイコーエプソン株式会社 記録装置
KR20200011809A (ko) 2018-07-25 2020-02-04 휴렛-팩커드 디벨롭먼트 컴퍼니, 엘.피. 녹업플레이트를 이동시키는 구동력에 의해 회전하는 픽업 롤러
CN109677965A (zh) * 2018-12-29 2019-04-26 厦门汉印电子技术有限公司 一种打印纸倾斜修正方法、装置、打印机和存储介质
CN110103599B (zh) * 2019-04-30 2025-06-10 厦门汉印股份有限公司 一种打印片材的输送件和打印机
JP7521288B2 (ja) * 2020-07-13 2024-07-24 セイコーエプソン株式会社 媒体搬送装置、記録装置及び媒体搬送装置の制御方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05270078A (ja) * 1992-03-24 1993-10-19 Ricoh Co Ltd シート位置合わせ装置
US6805342B2 (en) * 2001-11-08 2004-10-19 Seiko Epson Corporation Printer-control method and printer-control apparatus
JP2007084224A (ja) 2005-09-21 2007-04-05 Seiko Epson Corp 記録装置及び液体噴射装置
US7591457B2 (en) * 2006-08-23 2009-09-22 Canon Kabushiki Kaisha Printing medium transport apparatus and method and printing apparatus

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3297551B2 (ja) * 1994-12-20 2002-07-02 キヤノン株式会社 シート材給送装置及び記録装置
JP3741190B2 (ja) * 1999-09-29 2006-02-01 セイコーエプソン株式会社 給紙方法及び記録装置
JP2003063080A (ja) * 2001-08-28 2003-03-05 Seiko Epson Corp 記録装置の記録紙終端位置検出方法、及び記録装置
CN100588599C (zh) * 2006-04-10 2010-02-10 株式会社理光 纸张处理装置和图像形成装置
US8896646B2 (en) * 2010-11-17 2014-11-25 Citizen Holdings Co., Ltd. Printer and paper feeding method for printer device
JP5644550B2 (ja) * 2011-01-28 2014-12-24 村田機械株式会社 画像形成装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05270078A (ja) * 1992-03-24 1993-10-19 Ricoh Co Ltd シート位置合わせ装置
US6805342B2 (en) * 2001-11-08 2004-10-19 Seiko Epson Corporation Printer-control method and printer-control apparatus
JP2007084224A (ja) 2005-09-21 2007-04-05 Seiko Epson Corp 記録装置及び液体噴射装置
US7591457B2 (en) * 2006-08-23 2009-09-22 Canon Kabushiki Kaisha Printing medium transport apparatus and method and printing apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10953646B2 (en) 2018-10-26 2021-03-23 ACCO Brands Corporation Laminating system with coded film cartridge

Also Published As

Publication number Publication date
US20150375949A1 (en) 2015-12-31
CN105269986B (zh) 2018-12-11
JP2016008124A (ja) 2016-01-18
JP6402508B2 (ja) 2018-10-10
CN105269986A (zh) 2016-01-27

Similar Documents

Publication Publication Date Title
US9573781B2 (en) Feed device and recording apparatus
US8876106B2 (en) Recording device
US8807556B2 (en) Sheet conveying apparatus, printing apparatus, and processing apparatus
JP4502004B2 (ja) 記録装置における媒体給送方法及び記録装置
US8439346B2 (en) Method of feeding medium in recording apparatus, and recording apparatus
US11142425B2 (en) Medium stacking device, medium treatment apparatus, and method of controlling medium stacking device
US9120336B2 (en) Ink jet printing apparatus and control method thereof
JP6287448B2 (ja) 走査装置
US20110133397A1 (en) Sheet feeding apparatus and image forming apparatus
CN104290465B (zh) 打印装置及控制方法
US9333771B2 (en) Image recording apparatus, method of controlling the same, and non-transitory storage medium storing instructions executable by the image recording apparatus
JP2009155038A (ja) 記録装置における媒体給送方法及び記録装置
US20130043639A1 (en) Printing apparatus and method for conveying sheet
US20200307267A1 (en) Printing apparatus, printing method, and storage medium
EP3575092B1 (en) Recording apparatus
JP2008069005A (ja) 画像形成装置及び画像形成方法
JP6303590B2 (ja) 印刷装置
JP2014118238A (ja) 搬送装置
JP6349848B2 (ja) 給送装置及び給送装置を備えた電子機器
JP2017196788A (ja) 印刷装置
US20130033537A1 (en) Printing apparatus and control method thereof
JP6443186B2 (ja) 印刷装置
JP2001287428A (ja) 印刷制御装置およびその動作プログラムを記憶した記憶媒体
US9174467B2 (en) Printer and printer control method
US9428357B2 (en) Conveying device and conveying control method

Legal Events

Date Code Title Description
AS Assignment

Owner name: SEIKO EPSON CORPORATION, JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KANEMARU, SHINJI;IGARASHI, HITOSHI;TANAKA, TAKAYUKI;AND OTHERS;SIGNING DATES FROM 20150526 TO 20150529;REEL/FRAME:035838/0379

STCF Information on status: patent grant

Free format text: PATENTED CASE

MAFP Maintenance fee payment

Free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1551); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

Year of fee payment: 4

MAFP Maintenance fee payment

Free format text: PAYMENT OF MAINTENANCE FEE, 8TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1552); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

Year of fee payment: 8